diff --git a/Dockerfile b/Dockerfile
index c3c9b90..ce7c686 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM debian:bookworm
 
 RUN \
     apt-get update \
-    && apt-get install --yes --no-install-recommends -qq python3 git python3-daemon python3-zeroc-ice zeroc-ice-slice \
+    && apt-get install --yes --no-install-recommends -qq python3 git python3-daemon python3-zeroc-ice zeroc-ice-slice ca-certificates \
     && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
     && useradd --system --no-create-home -U mumo